There’s loads I suppose. Older I get the more they stress me out and for some reason recently during lockdown I’ve tended to go for films of a more uplifting nature but nevertheless this is about stressful films or disturbing films you’ve seen..
Audtion, Japanese film. Loved it but end was awful

Eden Lake, the fire scene I hated. Good film
Come & See. Whole thing just made me feel dreadful. Too much given it is real.
Irreversable. Both the rape scene and the fire extinguisher scene made me feel wrong. Good film though.
Must be loads more.